Md Nazmul Islam

Once, I was walking down the road. There I saw some people establishing a new transformer. I became curious and went towards it to see how it is done. Then, I took a look at the plate. I saw something written like Dny11 on its body. Then, I wondered,...

The Economic Choice of Transmission Voltage - One day, I was teaching about transmission lines in a class. Then a student asked me a question, "Sir, how does the PGCB (Power Grid Company of Bangladesh) fix the transmission voltage as 132, 230, or 400 KiloVolt?" The question was logical....

AC-DC and Filament of an electric bulb | A love Story - Ever thought about, AC-DC and Filament of an electric bulb. Why can't DC be used instead of AC? Let's learn from a love story, shall we? It’s raining outside. The atmosphere is gloomy. Holding a cup of hot...

Why stones are used in Substation instead of Sand or Grass? Ever thought, why stones are used in substation instead of sand or grass? The reason is simple. But, can't be explained easily. What comes to mind when we hear about substations? Transformer, circuit breaker, lightning arrester, etc devices come...

What does mAh mean in a battery - What do we mean by the mAh rating? Especially, in the case of mobile batteries, what does it stand for? Today, I will discuss a very exciting topic with you all. At the age of 4G, there is hardly any person without...

Direction of current flow and electron flow- why are they opposite to each other? No matter how much research we do about voltage and current, people just can't get enough of it. The people are always curious regarding it. Moreover, most curiosity arises about why electron and current flow opposite...

Common misconceptions about Electricity and the solution to it - let's find out. Electricity is a part and parcel of our daily lives. We can not go a single day without it. During the summer times, we can not stay for a single while without fans and air conditioners....

Substation Synchronizing System - We all are familiar with the term Substation Synchronizing System. Today, I will try to explain it more elaborately. First, let us learn about substation synchronization. Substation Synchronizing System: The lexical meaning of synchronization is rhythm or consistency. In other words, synchronization is the process...

Optical Ground Wire: Transmission Line is not unknown to us. While travelling on a train, on a highway or even by river, these transmission lines can be seen. Moreover, students of Electrical Engineering can never overlook it. You must have noticed a very thin wire on the apex of the...

What are the causes of Load shedding? How it differs from the conventional concept. The truth behind load shedding. What are the causes of Load shedding? Is a power outage called load shedding? Load Shedding: A concept remains in general people's mind that power outage is load shedding. What is the reality behind...

Hunting effect in the synchronous motor is a common term in the field of electrical engineering. So let's learn it today using an example. What is the Hunting effect in the synchronous motor? As the name suggests, synchronous motors are capable of running at constant speed irrespective of the load acting...

What would happen if an electric power transmission line wire falls into a river? Today, we are going to discuss an interesting topic. Have you ever wondered? If the live river crossing electric power transmission line wires of 132kV, 230kV, 400kV breaks and falls into a river, then what will...